CN1224561A - Temporary equipment identifier message notification method - Google Patents
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- CN1224561A CN1224561A CN96197181A CN96197181A CN1224561A CN 1224561 A CN1224561 A CN 1224561A CN 96197181 A CN96197181 A CN 96197181A CN 96197181 A CN96197181 A CN 96197181A CN 1224561 A CN1224561 A CN 1224561A
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
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- H—ELECTRICITY
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- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
Energy expenditure is reduced in a wireless subscriber station operating in a Cellular Digital Packet Data (CDPD) system by deleting the operation of decoding the Forward Error Correction (FEC) blocks (69). The decoding of the FEC blocks can be deleted by virtue of using opening and closing Temporary Equipment Identifier (TEI) messages having a minimum Hamming distance from all the other TEI messages (62). Base Error Rate is measured to determine when the necessity of decoding an FEC block exists.
Description
Please be the subsequent application of No. the 08/533rd, 152, the U.S. Patent application submitted to September 25 nineteen ninety-five in this.
The technical field of the invention
The present invention relates to radio communication device.The scan operation that relates in particular to the control wireless subscriber station is with power consumption and the extending battery life of restriction to this wireless subscriber station power supply.
Background technology of the present invention
The analog cellular system in modern age that is called as " advanced mobile phone service " user's mobile wireless duplex transfer voice (AMPS) adopts the carrier frequency of FCC appointment, and its scope is 800～900MHz.Vehicle-mounted cellular telephone is with the cellular base station in the highest 1 watt given network element of power transmission voice signal to.The highest 1/4 watt cellular base station of transmitted power in a given network element of battery powered hand-hold type cellular-phone utilization sends voice signal.
Human simulated voice is the signal that the advanced mobile phone service system is designed for communication at first.Advanced mobile phone service is optimised, is able to can transmit analogue voice signal as much as possible in the bandwidth of a given channel.(mobility of 800～900MHz) cellular phone is that the cellular configuration by base station realizes to adopt low power mobile phone, FM modulation and higher carrier frequencies scope.When moving out current network element district as the user, his signal promptly is sent to next network element side.Temporarily losing during the transmission of this honeycomb fashion may cause sending or receiving.Temporarily losing of voice signal is inessential, has dropout and speech information to be sent here because the user knows again, yet sends for numerical data, even dropout is temporary transient, also can produce specific question.Other reason that voice signal is lost in sending has signal strength signal intensity to reduce, reflection, Rayleigh decay and honeycomb blind spot.
The utilizability of portable computer has caused the hope of carrying out the wireless transmission numerical data from remote place very naturally.At present, advanced mobile phone service speech cellular system is used to send numerical data with the form of the honeycomb fashion data of circuit conversion by the advanced mobile phone service carrier channel.Original (base band) numerical data must be through conversion to make it by simulation advanced mobile phone service system's transmission and to receive.The advanced mobile phone service system is as a shortcoming of transfer of data, and the narrow and transmission error of channel width has limited the baud rate of transmission and receiving digital data.And the other factors of advanced mobile phone service mobile cellular system also may cause losing of initial numberical data.
Therefore, effective radio communication of speech in integrated package and data-signal is very difficult always.And be difficult to the application of advanced mobile phone service speech transmissions characteristics with in full reportedly defeated, Email and duplexing paging and so on combined, be difficult to provide the circuit conversion formula cellular data interface as the radio facsimile modulator-demodulator to be incorporated into a single hand-held battery operated radio apparatus simultaneously.This respect is partly by the honeycomb fashion digital packets data system of describing in cdpd system 1.1 versions (combined here application is material as a setting), the U.S. Patent application the 08/117th of the commonly-assigned us of this invention, the system that discloses in 913 (submissions on September 8th, 1993) and the 08/152nd, No. 005 (submission on November 12nd, 1993) patent application realizes.The CDPD communication system is common to the same carrier frequencies that is assigned to the advanced mobile phone service channel described in CDPD standard (the CDPD standard is used as reference) 1.1 edition 4s 05 joint.
The typical base station of cdpd system or mobile digital base station (MDBS1, at this as shown in fig. 1) utilize the channel in the advanced mobile phone service network element to set up link and communicate with user's wireless private station.MDBS can utilize other frequency outside the available advanced mobile phone service that the ISP provides.Wireless private station (M-ES2) is a portable computer, and mobile phone or other comprise the portable electron device of private communication platform.MDBS is used as the communication link between ISP's network of the user of air station private station M-ES2 and a Wireline, microwave communication line, satellite communication circuit, advanced mobile phone service cellular communication circuit or other CDPD link (for example mobile data intermediary system MD-IS3 and intermediary system 4,5,6), with wireless private station, computer network or non-moving type or the fixed terminal custom system (F-ES7,8) that transfers data to other.
The CDPD network is designed as the existing communication network, as the expansion operation of advanced mobile phone service network and the Internet.From the mobile subscriber aspect, the CDPD network only is the wireless portable expansion of legacy network.The transmission facilities of the shared present advanced mobile phone service network of CDPD network, and the non-intrusion type bag switched data services of not impacting the advanced mobile phone service service is provided.In fact, the CDPD network is fully transparent to the advanced mobile phone service network, and it " does not understand " the CDPD function.
Cdpd system adopts the connectionless networks service (CLNS) of individually being determined the path of each packet according to the information of destination address contained in the packet and current network layout by network.The branch packetize characteristic of the transfer of data of M-ES2 makes many CDPD users can share common signal channel, access channel just when they have data to send only, otherwise promptly allow it use by other CDPD user.The multiple access character of system makes it to offer the sizable CDPD area coverage of many users simultaneously under a given area (range of transmission and the zone of a standard advanced mobile phone service base station transceiver) only is equipped with the condition of a CDPD platform.
The broadcast communication line interface part of CDPD network is made up of a group NEs.Network element for example determines that the level of signal strength that it can receive is moved the user such as M-ES2 receives in the geographical frontier within the RF transmitting boundary of MDBS1 with a fixing transmitting station.Support the transmitter of this network element can be located in the central authorities of network element, launch, perhaps transmitter is positioned the edge of a network element by omnidirectional antenna.And by directional antenna launch cover network element only a part, be referred to as a sector.In the typical structure, the transmitter that is used for some sectors is installed jointly.Area by a group NEs effect has some region overlapping, so that the mode that a roaming wireless subscriber board can transmit with the standard that roughly is similar in the advanced mobile phone service system keeps continuous service by the network element mode in abutting connection with network element that is transferred to.If M-ES can be kept the service of connection by the conversion from a network element to another network element, just think that this two network element is adjacent.This conversion process that is referred to as the network element conversion has nothing to do with normal advanced mobile phone service transport process.Among Fig. 1, " broadcast interface " that the rf frequency link of employing standard advanced mobile phone service frequency is constituted of serving as reasons of the interface (A) between wireless private station 2 and MDBS1.MDBS1 is connected to other mobile data base station by mobile data intermediary system (MD-IS) 3.Several mobile data base stations can be subjected to the control of a single mobile data intermediary system.The mobile data intermediary system interconnects by the intermediary system as 4 among Fig. 1 and 5.
Intermediary system is connected to not only the node of a sub-network by at least one and forms (as intermediary system MD-IS 3).The main effect of intermediary system is that data are sent to another by a sub-network.Mobile data MD-IS 3 is according to the situation in the current place of each the wireless private station within the scope of the mobile data base station under the MD-IS control, the route of specified data bag.MD-IS is the only network entity in the place of " awaring " arbitrary wireless private station.But (defined as CDPD standard 1.1 versions) in some cases, a certain mobile data base station will monitor the situation of specific wireless private station all the time.One CDPD special mobile network location association's justice (MNLP) operates (passing through intermediary system) between each MD-IS so that the locating information of the relevant wireless special station of exchange.
Whole C DPD network has with the network management system (nms) of the interface of at least one mobile data intermediary system 3 by one to be controlled.Utilize a specialized protocol, can under suitable condition programming instruction be sent to the mobile data base station of any amount by NMS 10 by MD-IS 3.
Such programming instruction can be used to transmit useful network data to MDBS, and keeps the operation that the such key features of channel queue is organized structure MDBS at resembling.NMS also controls other cdpd system characteristic, for example to the timing of beep-page message to meet revocable cycle of M-ES mobile phone.The advantage of CDPD is by MD-IS 3 by NMS 10, perhaps rely on the direct connection of MDBS, provide the ability of operational order to the mobile data base station,, summarized in the MDBS architecture explanation of being done in the joint 402 and 403 as CDPD standard 1.1 versions.
Comparison between the CDPD network of Fig. 2 key diagram 1 and the standard advanced mobile phone service network.MDBS 1 is the CDPD equivalent of advanced mobile phone service base station 21, and both all are used as mobile subscriber's link, 2,2 ' and 2 " be used for cdpd system, 22,22 ' and 22 " be used for the advanced mobile phone service user.The two function of advanced mobile phone service and CDPD all can be by identical mobile phone or terminal system Equipment Control.MDBS1 is preferably with advanced mobile phone service base station 21 location, as the back is described in more detail.
As the local controller to the CDPD mobile data base station that is connected to it, MD-IS 3 is equivalent to be used for controlling a plurality of advanced mobile phone service base stations 21,21 ' and 21 usually " MTSO (MTSO) 23.In the advanced mobile phone service system, MTSO 23 can be connected to each different base station 21,21 ' and 21 via the landline road of special use or by Public Switched Telephony Network (PSTN) by communication line ".Equally, MD-IS 3 and different mobile data base station 1,1 ' and 1 by its control " between also connect in the same manner.But adopt different signaling protocols with the advanced mobile phone service system.
Compare with advanced mobile phone service, the foundation structure demand of CDPD is very little.The CDPD base station equipment preferably is positioned at the network element side of the honeycomb substrate of existing advanced mobile phone service base station cellular device.The multiple access characteristic of cdpd system makes it can only install in a given area under the situation of a CDPD wireless device and provides sizable CDPD area coverage to many users simultaneously.This multiple access is that a mobile terminal system is only just visited the result of CDPD channel when having data to send.
If advanced mobile phone service base station and MDBS are placed in same place, the two can utilize identical RF equipment.On the contrary, for shared RF communication link, the MTSO of advanced mobile phone service system is in the same place with then unnecessary the putting of the MD-IS of cdpd system.In the advanced mobile phone service system, MTSO 23 has the responsibility that arrives other parts by PSTN 24 connection advanced mobile phone service base stations and travelling carriage.The intermediary system 4 of CDPD is the application of advanced mobile phone service system corresponding to PSTN.As the advanced mobile phone service system, be the calling that realizes remote user or system by telephone system terminal network 28, cdpd system also must utilize Public Switched Telephony Network or other land route communication network.But for to finish calling by PSTN, cdpd system adopts and the used different agreement of advanced mobile phone service system.
The channel flow that MDBS keeps many (arriving the MDBS transfer capability at most) by the broadcast communication line interface is as specified by the MD-IS of this MDBS of control.When needed, for example when on the CDPD channel advanced mobile phone service communication being detected, MDBS indicates all wireless private stations to change channel.The terminal of each wireless private station stream is carried on the channel flow at every turn, normally by the mobile subscriber mostly according to selected by the data of the MDBS reception of the relevant optimum channel for the CDPD application.Dealing business in the one given network element (the terminal stream of MDBS) is carried on the single DSO trunk line between MDBS and the MD-IS.Follow reference format by communicating by letter of this DSO trunk line between MDBS and MD-IS, as T
1
In the CDPD network, numerical data adopts Gauss's least displacement keying (GMSK) modulation to transmit between MDBS and M-ES.Transmission from base station to wireless private station M-ES is continuous.These adopt burst mode by wireless private station M-ES to the transmission of MDBS, and this moment, wireless private station M-ES only had data to send and channel is just visited this channel when not taken by other mobile wireless private station at it.This makes the shared individual channel of a plurality of mobile wireless private stations energy, the data of the sexual behavior affair characteristics of singly having a rest of small data quantity transmit and for having relatively very, with send numerical data by common circuit conversion cellular modem and compare, can significantly reduce the connect hours.
With signaling plan used in the normal cellular formula modulator-demodulator (it be according to must be in the restriction of existing voice signal system the operation of needs selected) different, the GMSK modulation technique that is used for CDPD communication is clearly at selected for obtaining at very high bit transfer rate of honeycomb fashion channel and good error performance.Select modulation not limit this fact and make the much bigger instantaneous bit rate of acquisition when the low-down received signal level of specific energy mutually in cdpd system and the common cellular modem for the signal structure of preexist.This just means, the CDPD communication system many signal qualitys can not be well-adjusted the area of cellular modem performance reliable high speed data transfer is provided.Current, original (base band) numerical data that transmits by CDPD comprises that email message is arranged, the digital fax data, and perhaps other shows that network connects and just is being connected to the numerical data that transmits the local area network (LAN) so that file can resemble.
Mobile data intermediary system MD-IS 3 is the wireless private station handle packet of the all-access route in its service area.MD-IS carries out two kinds of services: preserve each current enrolled for service that is deposited with the M-ES information bank in a special services place; With the service of re-addressing, go to encapsulate the digital packets that is transmitted and determine that they go to the route of correct network element.MD-IS in the service also uses for network support service and accepts discriminating, authorizes and the statistics service.
The CDPD communication system can be utilized the dedicated channel operation that is provided with and be left the CDPD application outside the combination of cellular voice channel.In this replacement scheme, typical operational mode is, the CDPD communication system can be utilized also the free time on the channel that can be adopted by advanced mobile phone service communication.Under this second kind of situation, the mobile data base station can be carried out " RF sampling " and determine available channel and detect to be currently used for the initial of voice communication service on the channel of CDPD in communicating by letter.If an advanced mobile phone service cellular unit begins to transmit on a channel that takies for CDPD signal post, the CDPD unit is promptly ended the transmission on this channel and is transformed into other available channel (being called the processing of " channel jumps over "), if or do not have other channel and can use, then end to transmit and can be used for CDPD until a channel.
Although the shared existing advanced mobile phone service radio-frequency channel of cdpd system, always the priority that is given is at first called out in advanced mobile phone service, and they can seize any just by the channel in the CDPD application all the time.But, the cellular services supplier might select the one or more channels that are exclusively used in CDPD.In this case, advanced mobile phone service is called out and will never can be attempted preemption and be exclusively used in the channel of CDPD.
Normally in service, MDBS will carry out channel and jump over and avoid the channel that will use for advanced mobile phone service signal post.For like this, MDBS carries out the monitor operation to the advanced mobile phone service channel, and preserves state (taken or be not employed by the speech) table that can be each channel that CDPD uses in the network element.MDBS does not choose the channel of using for CDPD according to the combination of criterion (not specifying in the CDPD standard) by being employed in the table in the channel.These comprise contingent following situation possibly: channel will be required for being permitted system for electrical teaching in nearest future, to the interference volume that channel took place, CDPD communication may be to other voice user in the different network elements or the interference volume that other sector is caused, and other factors.MDBS transmits the table of a channel that might use for CDPD (current do not have taken by voice communication) to wireless private station.If MDBS determines other channel and more suitably talks about that it can be carried out channel and jump over before channel is taken earlier by advanced mobile phone service communication.Under these circumstances, MDBS sends a message to wireless private station, orders them to change to selected special channel, and then MDBS carries out and jumps over.This class jump over jump over than unexpectedly orderly and much effective because wireless private station need not to search for next channel.
If existing CDPD channel is that advanced mobile phone service takies in advance, MDBS is by selecting other channel in those channels that do not utilized by advanced mobile phone service communication and jumping over and need not to notify wireless private station (accident is jumped over) to it immediately.Then wireless private station determines that the CDPD signal no longer appears at the channel (if present) of other channel to determine that CDPD communication has jumped to on the current channel and in the search list.
CDPD has the ability that is easy to existing advanced mobile phone service system interface and some headend equipment shared with it.For utilizing kind of an ability, MDBS must have ability actual and existing advanced mobile phone service base station interface.Thereby MDBS should very little, accessible, also can needn't interrupt existing advanced mobile phone service equipment and can be easy to conduct interviews.MDBS must be got the equipment that can be easy to be connected to outside normal and the MDBS that the advanced mobile phone service system is shared by the group structure.This external equipment that is present in the advanced mobile phone service base station comprises antenna system, RF power amplifier (particularly linear amplifier that can be shared) with existing advanced mobile phone service, RF multiple-path coupler, power splitter, antenna multicoupler, and optional equipment.Because MDBS shares the environment of advanced mobile phone service base station, MDBS not object environment controls and safeguards that such back-up system constitutes too big added burden.Therefore, MDBS must be compact and flexible, only constitutes and carry out the required required parts of MDBS function in network element side.
Fig. 3 is the block diagram of a portable mobile terminal mobile phone 100.This portable mobile terminal is similar to the common portable radiotelephone mobile phone of the radio frequency component 102 with at least one radio-frequency (RF) transceiver substantially.Radio-frequency (RF) transceiver utilizes a main antenna 104 to receive and send by the handled various forms of signals of portable terminal device, for example advanced mobile phone service data (circuit conversion cellular data) communication, and the advanced mobile phone service Speech Communication is communicated by letter with CDPD.Diversity antenna 106 is used as reserve, to guarantee the reception under some rough sledding.Telephone-type mobile phone 112 is used to do the advanced mobile phone service Speech Communication.
Portable terminal device also can be connected to the data/analog access interface (DAA) of controlled in wireless processor 108 and inserts local public phone exchanges network (PSTN) by one.This processor is shared the various controlled function of portable terminal devices together with processor controls and modulator-demodulator 109, comprises call setup, high-level protocol, low level protocol, power adjustments, modulation operation and transmits with the data of external host computers.Use for ease of the user, master computer can be a personal-machine (PC) or family expenses data assistant equipment (PDA) or other electronic installation.The connector of portable terminal device is to combine the standard type of using with the outer connector of PC usually.
The portable data terminal mobile phone of Fig. 3 explanation and wireless private station can be achieved all operational modes that show and describe by the group structure in No. the 08/117th, 913, U.S. Patent application in Fig. 4.The menu mode that 200 specified modal representations are selected by the operating personnel or the programmer of portable data terminal mobile phone among Fig. 4.One of two kinds of patterns (advanced mobile phone service or CDPD) can utilize the keyboard on the mobile phone to be selected by the operator.If a master computer is imported data in the portable terminal device (mobile phone) 100, the part that then can select a chosen pattern or a predetermined default setting to transmit as data.
System preferably is in lower powered sleep pattern usually.This sleep is that still-mode is facilitated minimal power consumption.Usually, sleep pattern was interrupted once per 10～255 seconds, with the message of paging signal of checking for example input and so on.If do not receive any message, CDPD remains idle pulley.CDPD can be because of receiving paging signal or becoming state of activation from master computer or cellphone subscriber for the order that the data that start in the CDPD pattern transmit.The advantage that remains on the CDPD pattern is that battery does not have heavy burden, thereby according to current battery process, the talk time under the full transmitted power can be longer than 1 hour and monitor that simultaneously the stand-by period of advanced mobile phone service control channel can be longer than 12 hours.
Sleep mode procedures is used to mobile phone is placed sleep pattern, and this is defined as set up process (communicating by letter between wireless private station and mobile data intermediary system) in data link during, the optional operator scheme that wireless private station M-ES may require.The purpose of sleep pattern is to help reserve capacity in the wireless private station.The overall moving enforcement M-ES of sleep pattern can forbid or cut off the power supply of its receiver and interlock circuit.This pattern is the major advantage of CDPD operation.
Sleep mode procedures is moved in " multiframe is set up state ".In service at this, if a specific wireless private station M-ES is connected no any frame exchange with data link between MDBS after by the time cycle of parameter T203 defined, this data link connects temporary equipment identifier (temporary equipment identifier) sleep state that can be placed in mobile phone.During this state, whole network all will can not be transmitted as this M-ES specified message.If new frame becomes outstanding also waiting for and begins transmission after entering sleep state, network just will be broadcasted a predetermined message with the interval in cycle.This message contains the table of the uncertain temporary equipment identifier of a pair of channel data, and wireless private station expection meeting is waken up with all period interval, determining whether the data from them are uncertain, and informing network they be ready to receive these uncertain data.Usually, M-ES can withdraw from sleep state at any time.
Parameter T203 is illustrated in M-ES and is supposed to allow before entering the CDPD sleep pattern that data link connects the maximum time of going up no frame exchange.In user/special use (M-ES) side, the timing of parameter T203 is started or is restarted by the transmission of the data link layer frame of any pattern on the backward channel (from M-ES to MDBS).At network side, to the parameter T203 of a specific M-ES by the reception starting of data link layer frame on the CDPD channel (any pattern) or restart.If the value of parameter T203 lost efficacy, the data link entity will enter the temporary equipment identifier sleep state, and send the mark of this state from user side.Layer management entity can be taked conservation measures, for example the non-major part of other of disconnect user wireless receiver or its circuit.
The second parameter T204 represents that network side broadcasts the time interval of the temporary equipment identifier circular of uncertain data to a sleep M-ES.One channel flow is kept the single fixed cycle operator of parameter T204, and the temporary equipment identifier circular process of all user side management entities by explanation in the 403 chapter 6.8.8 joint of CDPD standard manifests and is synchronized to particular channel stream T204.The quantity of setting about circulating a notice of the frame of lining up in the maximum time of the M-ES in the temporary equipment identifier sleep state at network is relevant with implementation.Network discharges data link connection and discarded all frames that are arranged that temporary equipment identifier sleep circular process is interrupted.The maximum times of M-ES in the temporary equipment identifier sleep state of the uncertain Network Transmission of phase figure circular is designated as system parameters N204.Network normally end to from M-ES not response temporary equipment identifier circular message one by one comprise temporary equipment identifier sleep circular process as the temporary equipment identifier of parameter N 204.As a result, M-ES will cancel registration by cdpd system.
The complete description of aforementioned operation is seen CDPD standard 403 chapters 6.8 joints.The parallel work-flow of M-ES and MD-IS illustrates in the flow process of Fig. 5.The two identification M-ES specific user does last CDPD communication and when carries out.In this respect, M-ES and MD-IS both sides mutually synchronization mutually.Utilize internal clocking, the time lapse after nearest CDPD is communicated by letter between two element keeps track M-ES and the MD-IS is as indicating in the step 702.Like this, in operation according to this part of CDPD standard, if do not have data to send on either direction by the broadcast communication circuit in certain hour length (parameter T203), M-ES will enter sleep pattern and network will think that M-ES is sleeping, and will be specified as step 703.In case M-ES enters sleep pattern, carry out another fixed cycle operator among M-ES and the MD-IS both sides.
The total length of this one-period is determined by the product of aforesaid parameter T204 and N204.If network has data will be sent to M-ES in being considered to sleep, network is added to the temporary equipment identifier of this M-ES to have data and waits for sleep cell list on their particular channel stream.But, network will not send these data (step 704).When each frame is measured by parameter T204, network will send the temporary equipment identifier sign to a specific wireless private station M-ES, and indication has data waiting for this wireless private station.Like this, this wireless private station certain during the determined time frame by T204 must monitor the CDPD channel constantly, so that can determine whether this wireless private station of Messages-Waiting.
Table with the wireless private station that waits for the arrival of news is to broadcast periodically to all on this channel flow in temporary equipment identifier circular message.Time between such circular is specified by parameter T204.This parameter is determined the time span of expectation M-ES sleep before this message is waken up.When M-ES woke up, it was waited for until receiving a circular message.If the temporary equipment identifier of this M-ES is on this table, it has been ready to receive data its circular network.If the temporary equipment identifier of a specific M-ES is not on this table, M-ES gets back to usually another cycle length of one's sleep by parameter T204 appointment.If a temporary equipment identifier has been made a plurality of continuous circulars (being specified by parameter N 204) and has not been shown that it has been ready to receive the main body M-ES of data, network will think that this M-ES no longer is present on the cdpd system and abandons to this M-ES data in undetermined, and will be specified as step 705.
Communicate by letter if handle normal advanced mobile phone service in longer time included than parameter N 204 and the product of T204 time of this specific M-ES, then the data that this M-ES is preserved are discarded by network element.Like this, CDPD communication is promptly lost because of the normal operation of advanced mobile phone service communication.Thereby, need this private station M-ES to keep the length of showing enough its temporary equipment identifiers of supervision with CDPD channel one.This requires the additional period in the wake-up states, and the result is extra battery consumption.
Because the advanced mobile phone service mode operation is considered to have priority above the CDPD mode operation, so mobile phone preferably spends its most of the time and monitors advanced mobile phone service communication and only need be enough to search the specify message of wireless private station and exempt and go registration on the CDPD pattern.A kind of pattern of moving wireless private station M-ES is to keep monitoring the advanced mobile phone service control channel with the advanced mobile phone service pattern, interrupt inquiring about the CDPD network simultaneously periodically, when the advanced mobile phone service interrupt, wireless private station M-ES sends a request signal to the CDPD network, with wake up reply and definite CDPD network on whether have any data to send to this wireless private station in wait.Listening an appropriate time long (being generally T203) afterwards to waiting after replying from the return messages of CDPD network, wireless private station translative mode is also got back to the advanced mobile phone service channel.This transformation preferably occurs in and anyly is in before any relevant advanced mobile phone service page that the CDPD pattern may lose period retransfers when wireless private station.
The expected results of aforementioned operation needs wireless private station to maintain high relatively power rating so that can accept above-mentioned message.Thereby the power consumption in the wireless private station will be very big, thereby shorten the life-span of battery.This is the key factor of wireless private station operation.
For remedying this shortcoming, must make wireless private station to listen to wait that its temporary equipment identifier (TEI) or the time for any other control messages of the wireless private station of control that is sent by MD-IS or MDBS are minimum.
The big factors that wireless private station was worked for the time of accepting temporary device mark symbol news and must remaining high power state is to lack (in wireless private station part) predictability to the airtime of temporary equipment identifier signal.As a result, wireless private station will inevitably be lost time and power in very long communication cycle for the transmission of waiting for temporary equipment identifier.This also is like this for other required control signals the time.Though the timing of temporary equipment identifier signal mobile data link protocol (MDLP) layer be rule with predictable, as what illustrate in the chapter 3 of honeycomb fashion digital packets data standard version 1.1, but such predictability converts media interviews controls (MAC) layer that illustrates in the chapter 3 of honeycomb fashion digital packets data standard to.This is very crucial, because the MAC layer is finally controlled timing between MDBS and the wireless private station just.
The factor that this uncertainty is worked comprises:
(ⅰ) propagation delay by treatment element;
(ⅱ) queueing delay on the backhaul network (latency delays); With
(ⅲ) queueing delay at base station place.
Though these factors can't directly be assessed, the operating experience in the cdpd system shows that these postpone to produce ± 3 seconds uncertainty.As a result, wireless private station must be in wake-up states for the time of handling required extra 3 information sets of suitable temporary equipment identifier circular to the time (each information sets is about 50msec) of the frame of about 60 information sets or message flow and when temporary equipment identifier occurs here.This all is considerable times the in service of any wireless device, and particularly considering only needs 3 frames to handle suitable temporary equipment identifier circular when temporary equipment identifier occurs.Thereby traditional high power awakening mode requires the time greater than 2100% (63/3 * 100) of actual needs.
Another problem during the tradition of cdpd system is used is that for receiving the control messages except that temporary device mark symbol news, wireless private station needs extra supervision.They comprise:
(ⅰ) channel group structure message is provided as by this channel that faces network element mutually and utilized and carries out network element and transmit required information;
(ⅱ) channel identification message, it provides timing information, is parameter and other identification parameters of using do multiplexing about the user of control MAC layer;
(ⅲ) channel access parameter;
(ⅳ) translated channel message, it is used to control the user and is transformed into another channel; With
(ⅴ) ISP's message of Ti Huaning, it notifies the user other available ISPs.
Usually, these message are with quasi-regular spaced apart, and in the MDLP level queueing delay are arranged.The internal communication that also has MDBS postpones.The extra Looking Out Time that is used for wireless private station is necessary, because need these message for carrying out access to netwoks when mobile subscriber station enters once new network element.Like this, wireless private station just must be monitored continuously and receive all control messages above-mentioned to it.General required time length is about 5～10 seconds.Therefore, to be longer than far away be to receive and the required time (general block is about 50msec) of control message processing the time that monitors these control messages and spent.
In order to increase the life-span of battery in the wireless mobile private station, must reduce wireless private station greatly for receiving the time that temporary equipment identifier and other required control messages must monitor the CDPD channel.Yet subject matter is that all control messages above-mentioned are wireless private station and move needed in the CDPD pattern.
The another of power consumption is because of also being the decoded operation of forward error correction (FEC) information sets.As arbitrary digital system, the error correction in the CDPD communication is necessary.The elementary cell that transmits on the CDPD channel flow is 278 a fixed length error control piece.Transmission comprises and burst signal transmission wherein comprises an integer information sets (piece), alternately insert with various control marks and synchronization character, as the CDPD standard at forward channel format with formative each the relevant chapters and sections of backward channel in detailed description.
Each information sets is utilized system's Read-Solomon (Reed-Soloman) error correcting code coding shown in Fig. 8 (seeing CDPD specification version 1.1 chapters 4.31 joints 402 Figure 40 2-4).This coding is the basis to go up (63, the 47) Reed Solomon code that produces at finite field gf (64).Code word is based on 6 symbol.Information field is made up of 47 6 symbol (two-way 2), and the parity fields that is produced is made up of 16 6 bit signs.Like this, 282 information sets that promptly are coded as one 378.The two is common to this (63,47) Reed Solomon Coding to forward channel and backward channel in the CDPD communication.In normal CDPD, considerable time and energy are spent in the decoding of FEC piece.
The present invention's general introduction
Major advantage of the present invention is to utilize the ability of the delivery time of PREDICTIVE CONTROL message further to reduce the function consumption that is used for the CDPD private station.
Another advantage of the present invention is to reduce the wireless private station that the moves Looking Out Time to the CDPD channel on cdpd system.
An advantage more of the present invention is to increase the reliability that monitors control messages.
It is to have exempted being decoding FEC piece spended time and energy that the present invention also has an advantage.
These and other advantage of the present invention realizes by the operation method of wireless private station in wireless communication system of the power consumption of restriction in the wireless private station.This wireless communication system includes at least one for sending the base station that the communication information piece flows to a plurality of wireless private stations.The method comprises the step of temporary equipment identifier (TEI) message blocks in the monitor communication information flow, and wherein the temporary device mark symbol news piece comprises temporary device mark symbol news and a plurality of forward error correction (FEC) position.The method also comprises the step of determining basic error rate (BER).The method also comprises the step of only when BER crosses a predeterminated level FEC position being deciphered.
Second aspect of the present invention is to contain the communication means between base station and a plurality of wireless private station in wireless communication system.And the base station controlling packet contains one the message blocks stream of a plurality of temporary device mark symbol news separately corresponding to a plurality of private stations.The method includes all temporary device mark symbol news is arranged in the continuous group, begin this temporary device mark symbol news group and finish the step of this temporary device mark symbol news group with the temporary device mark symbol news of second uniqueness with the temporary device mark symbol news of a uniqueness.This other temporary device mark symbol news of unique temporary device mark symbol news and all has at least 6 characters different.
Brief description of drawings
Fig. 1 is the block diagram of the cdpd system of a routine;
Fig. 2 is related to the block diagram of conventional advanced mobile phone service system for cdpd system;
Fig. 3 is the block diagram of portable radiotelephone mobile phone;
Fig. 4 is the block diagram of MDBS architecture;
Fig. 5 is the flow chart of parallel work-flow between the wireless private station of the explanation MD-IS relevant with;
Fig. 6 illustrates that the message block structured message blocks of using in the PREDICTIVE CONTROL message transmitting time that comprises disposes;
Fig. 7 is the flow chart of the operation sequence of the system of the data configuration of explanation employing Fig. 6; With
Fig. 8 illustrates the configuration of FEC piece.
Detailed description of preferred embodiment
Fig. 6 impels the time flow graph of the message blocks configuration of battery life increase according to the present invention by reducing power application for explanation.As utilize most of CDPD function, the timing configured that shows among Fig. 6 is to utilize the mobile data link protocol (MDLP) that illustrates in 403 joints of CDPD specification version 1.1 to produce in MD-IS.As previously discussed, adjust owing to the variation in media interviews controls (MAC) level is not enough to realize satisfied reliability (illustrating in as the joint 402 of CDPD specification version 1.1) in the operation and the time of MDLP level.Thereby adopt the way that describes below to overcome this shortcoming.
The present invention can be applicable to the two-way paging variant and the conventional scheme of cdpd system.This two-way paging variant cdpd system with standard basically is identical, makes and can carry out two-way paging but have many changes, and is as described below.The two-way paging variant of CDPD resemble the cdpd system of standard can with the advanced mobile phone service shared channel.But this two-way paging variant is not limited to shared advanced mobile phone service channel, also can be used to the dedicated channel outside the advanced mobile phone service wavelength band.
In service at this two-way paging variant, private station must be obtained channel identification message before the enrollment process that defined is carried out in it can start usually by CDPD standard joint 407.This point is done the long supervision of uncertain time by private station and is finished.And private station also must be as normal CDPD is in service obtain channel recognition message (though can be before receiving channel identification message under certain environment transmitting) after shifting finishing network element on a new channel.This obtaining preferably in time finished, so that private station can take steps to prevent that MD-IS (3 among Fig. 1) from utilizing on the former channel flow of MDLP begins to retransfer.
Also because channel identification message contains the sector boss of epoch or current time of occurrence, after initially obtaining, private station must utilize channel identification message to come the RF network and align the fixed length that the network element of obtaining provides the time of occurrence structure.Usually, temporary equipment identifier data circulation message promptly begins after expiring to transmit in the first Data-carrying piece at the forward channel time slot being exclusively used in temporary equipment identifier circular message counter (the N210 appointment) regularly.All network element group structures, network element access parameter and replace identifier information after each temporary equipment identifier circular message transmits immediately before and the order transmission mentioned.If desired, base station (MDBS1 among Fig. 1) can and be replaced at channel access parameter and send multi path network tuple structure message before service identifier message is sent out.When channel massage that needs are converted, their are promptly after temporary equipment identifier circular message and transmission immediately before the network element group structure message.One aspect of the present invention is simplified in this arrangement of temporary equipment identifier and other control messages, illustrates as following.
The timing configured that shows among Fig. 6 is feasible no matter how to change the accurate timing of equal energy in queuing of MAC layer and the timing.This is by making MAC layer and wireless private station predict that the position of temporary equipment identifier and other control messages reaches in the whole message flow.For producing such predictability, communication information stream must be divided into several sections 60, such as shown in Figure 6.The time of occurrence of each will have a reference block 61 to identify the beginning of this time of occurrence.Like this, message flow is split up into a series of time of occurrence, and for example 60, each is with reference block 61,61 ', 61 " ... beginning.Each time of occurrence preferably is made of the piece of unified quantity.Illustrate that as following the continuing of time of occurrence is necessary for the whole Read-Solomon pieces (defined in this Read-Solomon piece such as the CDPD standard) of number.This quantity can be adjusted according to the traffic and other system requirements by the cdpd system supplier.
Under the normal condition, the MAC layer does not read the message of MDLP entity.Thereby, according to the present invention, determine that a standard makes the reference frame 61 of MAC layer identification to each time of occurrence 60 definition of N message blocks.The position of each reference frame selected in case with one external time standard, for example global positioning system (GPS) is consistent, can certainly adopt other timing standard.Importantly, wireless private station can move into awakening mode with this timing standard coordination and receive temporary device mark symbol news and any other necessary control message, if and do not find temporary device mark symbol news at this wireless private station, then get back to sleep pattern immediately.
For the timing information of being coordinated by a wireless private station and a standard is sent to wireless private station via channel logo message frame 66.This channel logo contains the date that the order reference block occurs.This frame provides timing information, is used to control the parameter of MAC layer, and identification parameter of channel is illustrated in the joint 402 as CDPD specification version 1.1 in use relevant with other.
For in the accurate prediction communication stream with the temporary device mark symbol news that occurs and the time of other control messages, also must know the appearance of the main body message of relative datum piece 1 really.According to one group of parameter at " startup " (when wireless private station is registered with cdpd system at first) time group structure, concerning MAC layer and wireless private station both sides, the location of temporary device mark symbol news 62 and other necessary control messages 63 is known.
For making the present invention keep its necessary estimated performance, local timing standard or benchmark must keep having ± accuracy of 20msec with respect to outside absolute time benchmark.If MDBS can not guarantee local time reference externally in the scope of absolute standard ± 20msec, this mobile data base station generally will be ended to send.
The mobile data base station can adopt two sources as outside absolute time benchmark: gps receiver, or based on the NTP time server of GPS benchmark.For the beginning that the prediction temporary device mark symbol news transmits, must understand fully the duration (for example time of occurrence 60 of Fig. 6) of a time of occurrence and the zero-time of this time of occurrence.The parameter that is designated as N212 is used for defining the duration of time of occurrence.The value of N212 is preferably predesignated and is assigned by NMS.The quantity that simultaneously also is the time of occurrence that taken place by calculating by base station time started of time of occurrence of the time started of reference block (as reference block 61) since a certain absolute original bench mark (as 1,995 zero o'clock) is determined.The time started of time of occurrence and duration specially send private station to by being positioned at current channel logo message by the end of the time of occurrence that private station received.
Mobile data base station and private station preferably can utilize N212 counter and forward channel transmission window to keep synchronously.The fl transmission window that it is unit that the N212 counter is set to 8 times of Read-Solomon piece times the duration.The forward channel transmission frame the duration by NMS (10 among Fig. 1) definition, and be sent to the mobile data base station.This parameter also is sent to private station by channel logo message as described above.Mobile data base station transmissions window must keep strict time calibration with local mobile data base station clock.Otherwise it just can not keep the predictability that temporary device mark symbol news transmits.
Fig. 7 illustrates the operation of cdpd system and private station.Enter when online at step 711 MDBS, the position of temporary equipment identifier and other control messages promptly is programmed into mobile data base station (MDBS1 among Fig. 1).In step 712, cdpd system (MD-IS among Fig. 1) sends the interval accurately of the temporary equipment identifier circular message that should send.This second timing data is comprised in by MD-IS and mails in the temporary device mark symbol news of MDBS.In step 713, MDBS reads temporary device mark symbol news to obtain this second timing data.The information of first timing data (comprising transmitting time or segment length and control messages locator data) is comprised in the channel logo message 66, and is specified as step 714).(annotate: second timing data is sent to private station in the temporary equipment identifier assistance messages).Timing in the message blocks sequence of this data based Fig. 6 of being apparent in is broadcast to private station (M-ES 2 among Fig. 1).
Will move required whole control messages and temporary equipment identifier timing data for the user can obtain within a new network element, the CDPD channel in the private station supervision awakening mode is until receiving whole control messages (step 720).This private station in this step also with external time standard coordinate mutually.This generally will need about 5～10 seconds.In case received by a private station about the timing standard of reference block with to the temporary device mark symbol news of this timing standard, this private station can enter sleep pattern before the temporary device mark symbol news of prediction transmits an about information sets (piece), be time frame.Although the collection of this timing data needs to monitor continuously that no matter which network element the user moves to, this only needs once.Made up about 5 seconds of the time of being saved by all other control messages that will follow closely behind the temporary device mark symbol news.This is that private station needn't consume the time in awakening mode, and has added the considerable reservation of battery life on the life time of private station.
Private station (M-ES 2 among Fig. 1) must be according to first and second timing datas and the time of advent (step 721) of determining next reference block from the input of outer timing standard (as GPS).Therefore, even private station has been in sleep pattern, it also must synchronously enter awakening mode with the appearance of reference block 61, and is specified as step 722.In step 723, private station determines to be assigned to the temporary equipment identifier of this private station whether in broadcasting by detecting operation.If private station is promptly at step 724 beginning traffic operation.If but do not detect the temporary equipment identifier that is assigned to this private station, would then carry out next treatment step (725).This step determines whether the private station operation needs other control messages.Usually such detection only need be carried out once, but finishes with the moment of MDBS registration at first at private station.But under certain environment, might need obtain some control messages again by private station.As the needs having, point out that as step 726 private station keeps waking up operation and monitors control messages 63.On the other hand, if needn't obtain other control messages again, private station can be after receiving temporary device mark symbol news 62 shift-in sleep pattern immediately, shown in step 727.The illustrated Timing Processing of step 721 is to the appearance of the reference block of next section or length and section 60 identical time of occurrence prediction next time.
Make the accurate delivery time can understand reference block 61 in case a wireless private station and an external definition device are agreed, wireless private station will be only these required control messages be sent out during maintain awakening mode to monitor the appearance of temporary device mark symbol news.If do not receive the temporary device mark symbol news 62 at these wireless private stations then, wireless private station promptly returns sleep pattern immediately.This makes wireless private station " know " the accurate piece number between the maximum duration of temporary device mark symbol news and these message and becomes possibility.
Other another advantage of level of this predictable control messages piece be that wireless private station can receive other control messages 63 (the channel group structure is converted channel, replaces the ISP, or the like) and can be in awakening mode the excessive loss time.This is aligned to all control messages pieces on predictable basis and comes together to finish.As illustrated in fig. 6, other control messages 63 is arranged on and is right after after the temporary device mark symbol news.But also can do other arrangement to temporary device mark symbol news.
For keeping the predictability by gained of the present invention, normal messages stream 64 is controlled to the uniformity of the section of maintenance or time of occurrence length 60.Carrying out constant measurement handles (step 715) and measures time between current message flow piece 64 and next reference block 61 '.At step 717 place, this value is compared with the message-length (measuring in step 716) that desire sends.If the message that desire sends is greater than the remaining time in the existing section, message promptly lies on the table and inserts pseudo-data 65 until the channel logo frame 66 that indicates in step 718 with afterwards.After temporary device mark symbol news 62' and the 63 ' transmission of other control messages, this message will flow in 64 ' in normal messages and restart.On the other hand,, then indicate, carry out normal message flow as step 719 if the remainder of normal messages stream 64 meets the space that exists before next reference block 61 ' occurs.This real-time operation is carried out the each several part that the normal messages of being handled by MDBS 3 flows.Thereby, arbitrary be considered to section or time of occurrence will lie on the table as the oversize normal communication information of the remaining space in 60 and next the section in resend.
A modification of the present invention provides special blocks or the frame that is assigned to by each private station of specific MDBS service.This is to finish by MD-IS sent to each private station one message before private station enters sleep pattern mode.This message comprises the accurate location to this user's temporary device mark symbol news.Because at any given time, very a large amount of private stations or beep-pager are not paged, a specific user circular message is inserted into many " vacation " value fills up space between other temporary device mark symbol news.
Also can use other technology and limit battery consumption in the private station.Fig. 6 also shows the segmentation of temporary equipment identifier piece 62.Be that the structure of piece 1 and 2 is according to the known configuration of CDPD specification by entitling among Fig. 6.Special mark be in piece 1 and 2 to be respectively 69 and 69 ' forward error correction (FEC) position by entitling.In each piece of 378, the redundant segments that is used for FEC occupies the major part of piece.Spend in the main consumption that correlation time of reading and deciphering the FEC position and energy have constituted battery supply in the mobile special station.Yet because the possibility of makeing mistakes, the FEC position always is considered to the in service necessary of CDDD system.However,, just a large amount of time and energy can be saved, the battery life of wireless private station can also be prolonged if needn't decipher to FEC.
In another embodiment of the present invention, dependence obtains avoids the FEC block decoding to the effective Hamming distance between other temporary device mark symbol news pieces in special-purpose temporary equipment identifier (following reference block 61 closely) of the beginning of message blocks 62 and the group 62.Last piece in 62 groups of the temporary device mark symbol news also is given the structure of a special use.Like this, this unique temporary equipment identifier value can clearly make a distinction with other temporary equipment identifier values, can also exempt a kind of error source.
For making the present invention feasible, even adopt starting and begin the unique texture (Fig. 6) of temporary equipment identifier piece in the section 62, appearance that also must the unique temporary equipment identifier piece of prediction.For a kind of method that reaches this point is to adopt technology described above.But, also may adopt other Predicting Technique to carry out this embodiment of the present invention, so this embodiment is not subjected to the constraint of aforementioned techniques, should point out, lack the ability of the transmitting time of the initial unique temporary equipment identifier of prediction, it is unpractical exempting the FEC decoded operation by private station.
As previously mentioned, this embodiment of the present invention has adopted the effective Hamming distance between this unique starting and ending temporary equipment identifier and other the conventional temporary device mark symbol news.But this might not be feasible between conventional temporary device mark symbol news.Hamming distance is measuring of figure place different between any two temporary equipment identifiers.Because temporary equipment identifier contains 32, this embodiment depends on minimum 6 potential differences and constitutes suitable Hamming distance.In other words, a unique temporary device mark symbol news is having at least 6 positions different in 32 positions with arbitrary conventional temporary device mark symbol news altogether.This result who brings is, for guaranteeing to keep the relation of 6 Hamming difference, the temporary equipment identifier that has the quite big quantity in the quantity of 232 combinations usually can be by rejection.
But in this embodiment, temporary equipment identifier arrange to be to determine at random, and to have Hamming distance be unlikely near temporary equipment identifier more than 6 so have any two at any time in same network element area.This operation is by the random assignment algorithm controls of also checking Hamming distance.If a unique temporary device mark symbol news has apart from the inadequate Hamming distance of conventional temporary device mark symbol news, MD-IS (1 among Fig. 1) can be checked through this situation, and redefines the temporary equipment identifier of one of private station in this network element.This Hamming distance with guaranteed unique temporary equipment identifier value combines, and combines with the assignment of temporary equipment identifier at random discussed above, makes that the decoding to the FEC piece of temporary equipment identifier circular message no longer needs.
In case the FEC piece no longer by private station decoding, just a problem occurs, although promptly keep the probability of enough Hamming distance very high, and mistake may not be detected.A kind of wrong technology of determining of FEC block decoding of not carrying out is to utilize the position that private station has been known before reception desires to add the message of inspection to measure basic error rate (BER).About 1/8 position is known, because they send private station in the temporary equipment identifier assistance messages.
By being compared with the position that receives, this known bits just may obtain the BER on a basis.If it is very high that private station is determined this BER, then this BER and a predetermined threshold values relatively can be determined whether need be to the time and the energy of FEC decoding for private station.In case private station is determined and will be deciphered FEC, unless just guarantee that message can not decodedly will not have mistake and disturb scan process.The processing of checking BER is initial with respect to the prediction temporary device mark symbol news, because of as above-mentioned each in succession time of occurrence or the distance between unique temporary equipment identifier of section (60 among Fig. 6) be that this known fact is simplified.
Because when BER was on the receivable level, scanning was that not decoded piece is carried out, so private station must accurately be understood the border of temporary device mark symbol news.Like this, it is promptly very important to shelve HDLC zero insertion function, because this operation will be moved the boundary position of desired temporary device mark symbol news.And HDLC zero insertion function also will be damaged the condition that all temporary equipment identifiers are consistent data byte.This HDLC frame requires to expressly provide industrial, and in the joint 402 of CDPD specification version 1.1 further discussion is arranged.
The aspect that the HDLC frame requires is " zero padding " technology.Zero padding 5 in succession " 1 " insert one " 0 " afterwards.This is normally used for data and frame delimiter sequence " 01111110 " are distinguished.Usually, receiving platform or private station will remove filled zero.But what in this embodiment of the invention, this filled zero can not detect or remove before scanning reliably not making the FEC block decoding.Like this, for avoiding this problem, just must not be adopted as the zero padding technology of HDLC framing in the present invention.
If generation channel error, private station may be thought normal temporary equipment identifier by mistake special-purpose initial or end temporary equipment identifier.Being that this thing happens in native system only needs 6 mistakes.And this is unlikely situation, if it has taken place really, during next circular, it will be corrected voluntarily.Although exist certain opportunity can repeat this mistake in during next circular, this is seldom possible.
Also depositing some possibility, promptly private station will be thought the temporary equipment identifier of another private station by mistake its.This may make mistakes and utilize aforesaid random assignment algorithm can not guarantee fully that this situation of minimum Hamming distance causes because of scanning.This is not a serious problem.If but system operators wishes to reduce the probability that this incident takes place, then can utilize additional operation, adopt this operation, when MD-IS (3 among Fig. 1) can detect in identical service area two or more temporary equipment identifiers and have Hamming distance less than 6.In case detect this situation, this MD-IS can stipulate again that at least one temporary equipment identifier reaches preferable Hamming distance.
Lose the problem of special-purpose temporary equipment identifier of ending and not serious, because private station has been known the maximum length that is used for temporary device mark symbol news section 62 (Fig. 6).If do not find the special-purpose temporary equipment identifier that finishes, according to known timing, private station will be abandoned simply searching for and continue fixed cycle operator and predict transmitting time to the reference block 61 ' that begins next section or time of occurrence, and fixed cycle operator is with regard to the appearance of measurable next special-purpose temporary device mark symbol news (in the piece group 62 ') thus.
For realizing the present invention, MDBS (1 among Fig. 1) should be able to deposit the temporary equipment identifier circular message that is sent by MD-IS (3 among Fig. 1).In case time of occurrence or section 60 (Fig. 6) lost efficacy, MDBS will send out last temporary device mark symbol news, shown in the section 63 of Fig. 6.For accomplishing this point, MDBS utilizes a special buffer to preserve the temporary device mark symbol news that is received.And MDBS also has the ability of the operation of shelving normal communication information.As previous explanation, so that can insert this temporary device mark symbol news in the accurate moment that the private station prediction sends.
This embodiment is also having other constraint aspect the normal CDPD operation, because arbitrary circular at interval (62 among Fig. 6) quantity of private station that may enter wake-up states can list in greater than single 136 a HDLC frame, the temporary equipment identifier table must be continuous in HDLC frame subsequently.The ending that special-purpose initial temporary equipment identifier must only appear at a HDLC frame can occur before scarcely.Because the special-purpose temporary device mark symbol news that private station may nonrecognition finishes, private station must know a single circular is used for the HDLC frame the upper limit how.Thus, private station can determine to add last piece of inspection.Each maximum length HDLC frame in circular cycle must occupy 4 pieces exactly.Only there is last HDLC frame in circular cycle may be shorter than this maximum length.For keeping the required condition of embodiment of the invention operation, MDBS must observe these standards.
Though for example understand various configurations of the present invention, the present invention is not limited in these.For example say that the present invention can be adapted to adopt other configuration that sends for PREDICTIVE CONTROL message except that aforementioned.Thereby should think any group of structure, modification, modification, combination or the suitable configuration of claim of the present invention.
Claims (2)
1. for limiting the operation method of described wireless private station in wireless communication system of power consumption in the wireless subscriber stations, described wireless communication system comprises that at least one is to send the base station of message blocks to the communication stream of a plurality of wireless private stations, is characterized in that said method comprising the steps of:
A) temporary equipment identifier (TEI) message blocks in the described communication stream of monitoring, described temporary device mark symbol news piece comprises temporary device mark symbol news and a plurality of forward error correction (FEC) position;
B) determine basic error rate (BER); And
C) only when described basic error rate surpasses a predeterminated level, described forward error correction position is deciphered.
2. the communication means between base station and a plurality of wireless private station in the wireless communication system, wherein said base station control comprises the message blocks stream corresponding to a plurality of temporary device mark symbol news of each private station in a plurality of described private stations, it is characterized in that said method comprising the steps of:
A) all described temporary device mark symbol news layouts are advanced in the continuous group; And
B) begin described temporary device mark symbol news group with a unique temporary device mark symbol news, and finishing described temporary device mark symbol news group with second unique temporary device mark symbol news, wherein said unique temporary device mark symbol news has other temporary device mark symbol news of at least 6 characters and all different.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US53315295A | 1995-09-25 | 1995-09-25 | |
| US08/533,152 | 1995-09-27 | ||
| US08/534,855 | 1995-09-27 | ||
| US08/534,855 US6694146B1 (en) | 1995-09-25 | 1995-09-27 | Method for reducing time required to receive and decode a temporary equipment identifier message |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021247536A Division CN1198472C (en) | 1995-09-25 | 1996-09-24 | Temporary device mark symbol news informing method |
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| CN1224561A true CN1224561A (en) | 1999-07-28 |
| CN1104167C CN1104167C (en) | 2003-03-26 |
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| CNB021247536A Expired - Lifetime CN1198472C (en) | 1995-09-25 | 1996-09-24 | Temporary device mark symbol news informing method |
| CN96197181A Expired - Lifetime CN1104167C (en) | 1995-09-25 | 1996-09-24 | Temporary equipment identifier message notification method |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021247536A Expired - Lifetime CN1198472C (en) | 1995-09-25 | 1996-09-24 | Temporary device mark symbol news informing method |
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|---|---|
| EP (1) | EP0875119A4 (en) |
| JP (2) | JP4008029B2 (en) |
| CN (2) | CN1198472C (en) |
| AU (1) | AU7372196A (en) |
| WO (1) | WO1997012491A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100344197C (en) * | 2004-07-21 | 2007-10-17 | 三星电子株式会社 | Apparatus and method for saving power of a mobile communication terminal |
| CN101232351B (en) * | 2007-01-16 | 2011-02-09 | 捷讯研究有限公司 | Apparatus, and associated method for selecting whether to reject a data segment received at a communication station |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2789833B1 (en) * | 1999-02-17 | 2001-11-16 | Info Telecom | METHOD FOR REDUCING THE DURATION OF ACTIVITY OF DIGITAL INFORMATION RECEIVERS AND DIGITAL INFORMATION TRANSMISSION SYSTEM |
| US6629151B1 (en) * | 1999-03-18 | 2003-09-30 | Microsoft Corporation | Method and system for querying the dynamic aspects of wireless connection |
| GB2358767B (en) * | 2000-01-27 | 2002-04-24 | Motorola Israel Ltd | Method and system for reducing power consumption in communication devices |
| US7856051B2 (en) | 2007-01-16 | 2010-12-21 | Research In Motion Limited | Apparatus, and associated method, for selecting whether to reject as invalid a data segment received at a communication station |
| CN101488827B (en) | 2008-01-14 | 2015-07-08 | 华为技术有限公司 | Method and apparatus for implementing data error reporting |
| CN108028725B (en) * | 2015-09-17 | 2021-07-30 | 日本电气株式会社 | Terminal device, control method thereof, and recording medium |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8200560A (en) * | 1982-02-15 | 1983-09-01 | Philips Nv | SYSTEM FOR COMMUNICATION BY RE-MESSAGES TRANSMITTED MESSAGES AND STATIONS FOR USE IN SUCH A SYSTEM. |
| JPS60182232A (en) * | 1984-02-29 | 1985-09-17 | Nippon Telegr & Teleph Corp <Ntt> | Selective call receiver |
| JPS61103332A (en) * | 1984-10-26 | 1986-05-21 | Nec Corp | Data receiver |
| US5199031A (en) * | 1990-08-31 | 1993-03-30 | Telefonaktiebolaget L M Ericsson | Method and system for uniquely identifying control channel time slots |
| JP2573738B2 (en) * | 1990-10-04 | 1997-01-22 | 株式会社小電力高速通信研究所 | Temporary address scheme in wireless communication system |
| US5265270A (en) * | 1990-10-31 | 1993-11-23 | Motorola, Inc. | Method and apparatus for providing power conservation in a communication system |
-
1996
- 1996-09-24 WO PCT/US1996/015381 patent/WO1997012491A1/en not_active Application Discontinuation
- 1996-09-24 CN CNB021247536A patent/CN1198472C/en not_active Expired - Lifetime
- 1996-09-24 CN CN96197181A patent/CN1104167C/en not_active Expired - Lifetime
- 1996-09-24 EP EP96935959A patent/EP0875119A4/en not_active Withdrawn
- 1996-09-24 AU AU73721/96A patent/AU7372196A/en not_active Abandoned
- 1996-09-24 JP JP51360497A patent/JP4008029B2/en not_active Expired - Lifetime
-
2006
- 2006-02-08 JP JP2006031641A patent/JP4657939B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100344197C (en) * | 2004-07-21 | 2007-10-17 | 三星电子株式会社 | Apparatus and method for saving power of a mobile communication terminal |
| CN101232351B (en) * | 2007-01-16 | 2011-02-09 | 捷讯研究有限公司 | Apparatus, and associated method for selecting whether to reject a data segment received at a communication station |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1104167C (en) | 2003-03-26 |
| EP0875119A1 (en) | 1998-11-04 |
| WO1997012491A1 (en) | 1997-04-03 |
| JP4657939B2 (en) | 2011-03-23 |
| CN1474607A (en) | 2004-02-11 |
| EP0875119A4 (en) | 2000-05-31 |
| CN1198472C (en) | 2005-04-20 |
| JP2006157956A (en) | 2006-06-15 |
| JP4008029B2 (en) | 2007-11-14 |
| AU7372196A (en) | 1997-04-17 |
| JPH11512900A (en) | 1999-11-02 |
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